Automatic stock-regulator.



No. 787,955. PATBNTED APR, 25, 1905. B. F. STEWART & F. W. MONAMARA.

AUTOMATIC STOCK REGULATOR.

APPLICATION FILED DCT. 21,1904.

4 SHEETS-SHEET 1.

u 'IIHIIIIIIl Il I Im U|||| @201ML mmmj No. 787,955. PATENTED APR. 25, 1905. E. F. STEWART L F. W. MONAMARA. AUTOMATIC STOCK REGULATOR.

APPLICATION FILED 0GT.21,1904.

4 SHEETS-SHEET 2.

No. 787,955. PATENTED APR. 25. 1905. E. F. STEWART & F. W. MONAMARA. AUTOMATIC STOCK REGULATOR.V

APPLICATION FILED 00T. 21, 1904.

4 SHEETS-SHEET 3.

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No. 787,955. PATENTED APR. 25, 1905. E. P. STEWART & F. W. MONAMARA.

APPLIUATION FILED 001221, 1904.

4 SHEETS-SHEBT 4.

i. and FREDERICK W. MCNAMARA, citizens of ilNlTTsn STATES Patented April 2B, 1905.

PATENT @Finca DWIN F. STEWART AND FREDERICK W. MCAMARA, OF MADISON,

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SPECIFICATION tbrming part of Letters Patent No. 787,955, dated April 25, 1905.

Application led October 31904. Serial No. 229,463.

To all whom t may concern:

Be itl known that we, EDWIN F. STEWART the United States, residing at Madison, in the county of Somerset and State of Maine, have invented certain new and useful Improvements in Automatic Stock-Regulators; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference be-A ing had to the accompanying drawings, and to 'the letters of reference marked thereon, which form a part of this specication.

This invention relates to new and useful improvements in automatic stuff (stock) regulating devices; and the object of the invention is to govern the quantity of the paper-making material supplied to a paper-making machine irrespective of the-speed thereof or of the percentage' of ber in the stuff-supply, so that thesheet of paper may at all times be of a uniform weight and thickness.

' The invention consists, further, in various details of construction and in combinations and arrangements of parts, which will be hereinafter fully described and then specifically. defined in the appended claims.

Ourinvention is illustratedin the accompanying drawings, which, with the letters of reference marked thereon, form a part of this application, and in which drawingssimilar letters of reference indicate like parts in the' views, in which- -Figure 1 isa central vertical section through our apparatus, parts being shown in elevation. Fig. 2 is a top plan view of the apparatus. Fig. 3 is an end elevation. Fig. 4 iis an en- I'arged detail view of a wing-gate. Fig. 5 is an enlarged detail view in elevation of the measuring-cylinder. Fig. 6 isa cross-sectional view on line 6 6 of Fig. 4. Fig.- 7 is a top plan View of the stock-measuring cylinder, showing the air and stock inlets. Fig. 8 is a cross-sectional view' through the stockmeasuring cylinder on line 8 8 of Fig. 1. Fig. 9 is a sectional view on line 9 9 of Fig. l. Fig. 10 is a side elevation of a flow-box; and

Fig. 11 is a sectional view through the flowbox, taken on line 11 11 ofV Fig. 10.

Reference now being had to the'details of the drawings by letter, A designates a stuffbox, into which a pipe A empties, through which stud' enters said box, coming -from any suitable source of supply. Mounted Ain anaperture or-opening in one wall of said stuifbox is. a measuring-cylinder B, a portion of said cylinder projecting, as shown clearly in the drawings, outside lof the box, while the part of the cylinder that projects into the box has an opening a, through which the stuff is allowed to freely flow into the cylinder. At a location diametrically opposite the flow into said cylinder is an exit-opening a. (Shown clearly in Fig. 1` and in the details of the drawings.) 'Mounted to rotate Within said measuring-cylinder is ashaft C, having radial wings C thereon. A detail of said shaft and wings is shown clearlyin Fig. 4 of the drawings and also in the sectional view through Fig. 4, in which the wings are shown as positioned equidistant and at right anglesto one another. The length of two of said wings, which are in alinement with each other, is equal to the entire diameter of the-measur ing-cylinder and 'is adapted to snugly wipe against the smooth inner surface of said cylinder. It will be observed that the opening into the measuring-cylinder for the admission of stuff is of large area in order to allow the stu' to freely flow into one of the compart` ments formed by a pair of said wings which will be substantially equal to one-fourth of the capacity of said cylinder.

Leading from the stuff-bor.'| is a pipe D, which opens into the lflow-box E, as shown in Fig. 1 of the drawings. Said flow-box is supported by means of rods F, which are fastened to the sides of the box` and the upper ends are connected to a cross-piece F', which has a knife-edge f, adapted to rest in hooks H in arms H of alever H. A fulcruln-shaft I is connected to said lever and has a' knifeedge I', which rests upon the inner circumference of eyes K, which are supported on the frameJ of the apparatus. A counterbalanced weight N is adjustably held upon one end of said lever H and may-be adjusted to-dillereut positions thereon .by means .of a screw N.

Rising fromthe shaft I is a post I', having a collar I3 adjustably mounted thereon and held in an adjusted position by means of a screw I, having an adjusting-wheel Is thereon. Pivoted to a lug z', which projects from the collar 1, is a rod O, which is pivotally connected at O' to a lever O", which in turn is pivoted at s upon an arm 0*. Y (Shown in Fig. 2 of the drawings.) On'e end of said lelsplined upon astub-shaft Q. mounted in suitable bearings,

and Q designates a drivingpulley which is fixed torotate with said shaft Q3, whereby power'may be applied to the shaft to rotate the same, power to rotate the measming-cylinder beingA applied from the constant speed-line of the paper-machine, so that its speed is always proportional to the lspeed of the paper-machine and the consistency of the stuff. Said stui-box isl provided with an veriiow or backfall A, whereby lthe overow may fall into a stuff-box A3 and through a pipe A4 return to the stuichest. The overiiow from the dow-box E is so arranged that any stuff from the iiowbox making exit at the overflow Eg will also fall into the stuffchest, as shown clearly in Fig. lof the draw ings. A weir Es is placed in the side o f the box near thebackfall and has .a row of vertical pins e se@ at intervals along the entire length 'of the Weir, which are designed to offer more or less resistance to the overflow stock.

Referring to Fig. 1 of the drawings, it will be observed that the lower end of the pipe D is provided with a hemispherical Shield D', centrally located' at its'orfic'e, .with the concave side toward the outtlowingstock, the use of which shield is to turn the force of the over ow stock away from the bottom of theiiowbox, thus preventing any change in equilibrium from the downward force of the How. From the construction shown it will be observed that a vertical movement of the counterbalanced How-box will be communicated to the friction-pulley Q', causing the same to rotate against theupper snrtaceof the' friction-wheel Cz near to or fartherA from the center thereof, accordingly as it may bedesired siderably greater amount of stock entering' to cause .the apparatus to run faster or slower.

InJ .operation .paper -stock from the stuifchest in the form of amixture of and wa; ter of varying consistency enters thestu-box A through the pipe A', andas there is econbox than is necessary llsto a point near the top and the surplus overflows into another .compartment and is returned to the chest. The part of the paper-stock which comes to the papervmachine enters the measuring-cylinder B, which por# osupply the .machine the tion-.of said cylinder projects within the box and fills the compartment intermediate twoot` the'wingsC'. As the shaft C rotates a measured quantity of the stuff is brought so that it wili mak-e exitthrough the outlet a through the bottom of the cylinder B, and the discharged stuii" may be conveyed to the papermachine in any suitable manner.

1t will be observed that the inlet to the cyli-nder B is at all times submerged, and the speed of the revolving wings is such as to insurethe perfect lling of each compartment formed by two wings. It will be observed in 'the device shown and descbed that a certain number of cubcinches of paper-stock will be delivered to the paper-machine for each unit of distance which the machine travels, and that a variation' of s-peed'in the. machine will produce a variation in the number of cubic inches of stock delivered by the measuring device to the machine. In general practice it has been'found that the chief cause for the variation in the thickness .of paper running on the -machines is the variations in the consistency of the stock as it is delivered from the beating-engine tov .thestu-chest or in the diliculty of maintaining uniformity' in the mixture `Qt .ber and water which constitutes the stock flowing to the machine.- To overcome the variation in the amount of fiber delivered to the machine by reason of the variation in the consistency of the stock, a novel feature'is employed in connection with the measuring-cylinder whereby a greater percentage of fiber ,in the stock is made to reduce yor a lesser amount to increase the speed IOO- of the -measuring'device tosuch an extent that the actual amount of fiber .delivered shall always be approximately uniform. To produce this effect, a continuous sample of stockin the stud-box isv at lall timesentering the ilow-,bo'x through the pipe D and after filling the box to a certain .height overflows through the obstructing-Weir described, returningto the chest with the surplus discharge at the hackfall E. v

The flow-box, it will be. observed, is a shallow hopper-shaped receptacle and is balancedand held imposition by the adjustable counterweight, and bythe provision of the weir provided with a rowv of vertical pins at intervalsa resistance is oiered'tothe overflowing stock. From the construction shown it will be observed that a vertical .movement of the box as suspended from the lever will communicate motion tothe friction-pulley Q through the medium of the supporting-rods F, the

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the rod 0, upon which said pulley Q is mounted. As the friction-pulley Q' is moved toward the center or circumference of the flat disk C2 the speed of the wheel will be varied, as will be understood, thus regulating the feeding of the stock to the paper-machine. The counterweight N upon the angle-lever H2 may be adjusted to hold the box in a level position when full of 'stock having a certain percentage of fiber in its composition. The speed of the friction-pulley may be adjusted by means of cone-pulleys, so that the revolving shaft C, with the wings thereon, willdeliver the required amount of stock to the machine to form a sheet of paper of the required.

weight and thickness.

1f the consistency of the stock should remain the same, the flow-box would maintain the same vertical position, which would hold the friction pulley or gear in the same position on the friction-disk C2, and the speed of the measuring device would vary with the speed of the machine; but should the consistency of the stock or the percentage of fiber in the mixture increase, making what is commonly termed thick stui, the resistance of the weir would become proportionatelygreater and more head would be required to force the ow through the weir, which would increase the quantity of the stock in the iiow-box and add to its, weight, whereby it would drop to a point where it would again be balanced by the counterweight. As the How-box falls the motion is communicated to the friction-pulley by the connecting-rod and pivoted lever, so that the pulley moves on the counter-shaft to a point slightly farther from the center of the friction-disk, reducing in this way the speed on the revolving shaft to the point where it will deliver the same amount offiber. as it did before the stock became thick.

Should the stock in the flow-box become thin, the reverse ofthe above operation would occur, and the speed of the rotary wing-shaft would be increased, so that the same quantity of ber would be delivered to the machine for each unit of speed that it travels.

The measuring-cylinder, it will be observed, is designed to deliver to the paper-machine a certain volume of stock from the chest for each unit of length in the sheet of paper being made and is arranged so that the volume of stock supplied is always proportionate to the speed of the machine. By the flow-box the speed of the measuring device is changed so that it is proportional to the actual quantity of paper-making material or fiber contained in the volume of stock measured.

While we have shown a particular detailed construction of apparatus illustrating the features of our invention, it will be understood that we may vary the details of the apparatus, if desired, without in any way departing from the spirit of the invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. An automatic stock-feeding apparatus for paper-machines, comprising a measuring device. a stuff-box and means for supplying the stuff thereto, a measuring-receptacle, communicating with said box, and means for measuring a given quantity of the stuff fed into the measuring-receptacle, a flow-box, communicating with the stuff-box, and means intermediate the said flow-box and measuring apparatus for automatically regulating the feeding of the stuff, as set forth.

2. An automatic stock -feeding apparatus for paper-machines, comprising a stufi` -box with overflow, a supply-pipe leading to said box, a measuring-receptacle opening into said' y box, provided with a suitable discharge-opening, a rotatable shaft 'mounted within said measuringreceptacle and wings upon said shaft, a counterbalanced How-box communicating with said stuff-box, connections intermediate said How-box and shaft, whereby the stock being fed into the flow-box regulates the rotary speed of said winged shaft and means for driving the shaft, as set forth.

3. An automatic stock-feeding apparatus for paper machines, comprising a stuff -box with overiiow, a supply-pipe leading to said box, a measuring-receptacle opening into said box, provided with 'a suitable discharge-opening, a rotatable shaft mounted within said measuring-receptacle and wings upon said shaft, a counterbalanced flow-box communicating with said stuff-box, a friction-disk mounted to rotate with said shaft, a drivingshaft, an antifriction-pulley splined to said driving-shaft, and adapted to bear against said friction-disk, and means intermediate said counterbalanced flow box and frictionpulley for moving the latter toward the center or circumference of said friction-disk, as set forth.

4'. An automatic stock-feeding apparatus for paper-machines, comprising a stu`box with overow, a supply-pipe leading to said box, a measuring-receptacle opening into said box, provided with a suitable discharge-opening, a' rotatable shaft mounted within said measuring-receptacle and wings upon said shaft, a counterbalanced flow-box communicating with said stuff-box, a friction-disk mounted to rotate with said shaft, a drivingshaft, an antifriction-pulley splined to said driving-shaft, and adapted to bear against said friction-disk, a pivotal lever, having arms engaging said friction-pulley, and means lintermediate said lever and counterbalanced flow-box for actuating said lever, whereby the friction-pulley may be moved nearer toward the center or circumference of said friction-disk, as set forth.

5. An automatic stock-feeding apparatus IIO for paper-machines, comprising a lstuff-box, a

measuring cylinder communicating therewith, a winged shaft rotating within said cylinder, a friction-disk fixed to said shaft and rotating horizontally, a driving -shaft andv friction-pulley splined' thereon, a lever engaging said friction-pulley, a flow-box communicating with -said stui-box, a pivotallymounted angled'lever supporting said flowbox, an adjustable weight upon said lever, connections between said lever and frictionpulley, whereby'theweight of the stock, being fed to the flow-box, may regulate the rotary movement of said winged shaft, as set forth.

6. An automatic stock-feeding apparatus for paper-machines, comprising a stuff-box, a`

measuring cylinder communicating' there- .7. An automatic stock-feeding apparatus' for paper-machines, comprising a stuff-box, a Supply-pipe leading thereto, a measuring-cylinder opening into said stuff-box, a rotary winged shaft in said cylinder, a friction-disk fixed to rotate with said shaft, a driving-shaft and a friction-pulley 'splined thereon and in contact with said friction-disk, a lever en-y gagingsaid friction-pulley, a flow-box having remesa a Weir at one edge thereof, a pipe leading from said stui-box and opening into the {lowbox, rods supporting said ilow-box, an angled lever with counterbalanced weight thereon, a shaft upon which said angled lever is fulcrumed, the arms of said lever having hooked ends in which the tlow-box-supporting rods have bearings, a post rising from the fulcrumed shaft of the angled lever, an adjustable sleeve mounted upon said post and a rod connecting said post with said pivotal lever engaging said friction-pulley,` as set forth.

8. An automatic stock-feeding apparatus for paper-machines, comprising a stubox, a supply-pipe leading thereto, a measuring-cylinder opening into said stuff-box, a rotary 'winged shaft in said cylinder, a friction-disk xed to rotatefwith said shaft, adriving-shaft and a friction-pulley splined thereon and in' contact withsaid friction-disk, a lever engaging said friction-pulley, a flow-box, a Weir upon one side of said flow-box, pins therein, rods secured to said flow-box, a pipe leading from the stuE-b'ox into the flow-box, a shield at the end of said pipe, acounterbalanced angled lever and a shaft upon which it is fulcrumed, a cross-piece connecting. said rods and provided with a knife-edge resting in the hooked arms of said angled lever, a post rising from said fulcrumed shaft, an adjustable sleeve upon said post and a rod connecting said sleeve with said pivotal lever which actuates the friction-pulley, as set forth.

In testimony whereof we hereunto'ax our vsignatures in presence of two witnesses.

-EDWIN F. STEWART..

FREDERICK W. MCNAMARA. Witnesses:

F. L. SMITH, W. R. CHAPMAN. 

